I wetsanded with 400 grit for the final. 180 and 220 when doing the bondo work. If you'd like some help next weekend let me know and I'll come over and help.
Ahhh yes, I had to do the same thing...we wet sanded with 1000 grit till it was mostly smooth, then laid down a thin coat of clear, let it sit for about 15 minutes, then do a final thicker coat. We still had to wet sand it again after that, but it turned out much better the second time.